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Vesta Collisional History Revealed by Dawn: Building a Vesta Global Crater Catalog

Marchi, S. and McSween, H.Y. and O'Brien, D. and Schenk, P. and de Sanctis, M.C. and Gaskell, R. and Hiesinger, H. and Jaumann, R. and Mottola, S. and Preusker, Frank and Raymond, C.A. and Roatsch, T. and Russell, C.T. and Yingst, R.A. (2012) Vesta Collisional History Revealed by Dawn: Building a Vesta Global Crater Catalog. In: 43rd Lunar and Planetary Science Conference Abstracts. 43rd Lunar and Planetary Science Conference, 2012-03-19 - 2012-03-23, The Woodlands, Texas, USA.



Introduction: Vesta is a 530 km diameter differentiated rocky body in the main asteroid belt that accreted within the first few million years after the formation of the earliest solar system solids [1,2,3]. These circumstances, along with the fact that Vesta's surface is probably sampled in meteorite collections, make Vesta one of the best targets for studying the early evolution of the main belt. According to current dynamical models [4,5,6,7], Vesta early evolution took place in an environment where collisions with other asteroids were much more frequent than today. While these models can inform our interpretations of Vesta's history, detailed studies of its impact record are necessary to discriminate between these different models and determine to what extent its surface has been reworked by cratering. Dawn observations of Vesta confirm and extend the range of geologic and impact processes seen on smaller asteroids. One of the obvious features emerging from these observations is that the surface of Vesta is dominated at all scales by impact craters. The lack of many of the obliteration processes that may occur on larger bodies (e.g., erosion on Mars, Venus; lava emplacement on the Moon and Mercury) allows for greater preservation of craters on Vesta. Observed crater sizes range from the resolution limit (10s of m for the low-altitude mapping orbit) to the largest ~500- km impact basin at the south pole, called Rheasilvia. Craters excavate and expose layers of different materials, drive regolith formation, and induce mass-wasting. Here we present the first attempt to develop a global crater catalog for Vesta that can be used to assess some of the above mentioned processes.

Item URL in elib:https://elib.dlr.de/79814/
Document Type:Conference or Workshop Item (UNSPECIFIED)
Title:Vesta Collisional History Revealed by Dawn: Building a Vesta Global Crater Catalog
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Marchi, S.NASA Lunar Science Institute, Boulder, COUNSPECIFIEDUNSPECIFIED
McSween, H.Y.University of Tennessee, Knoxville, TNUNSPECIFIEDUNSPECIFIED
O'Brien, D.Planetary Science Institute, Tucson, AZ, USAUNSPECIFIEDUNSPECIFIED
Schenk, P.Lunar and Planetary Institute, Houston, TXUNSPECIFIEDUNSPECIFIED
de Sanctis, M.C.Istituto Nazionale d'Astrofisica,Rome, ItalyUNSPECIFIEDUNSPECIFIED
Gaskell, R.Planetary Science Institute, Tucson, AZ, USAUNSPECIFIEDUNSPECIFIED
Hiesinger, H.University of Muenster, GermanyUNSPECIFIEDUNSPECIFIED
Mottola, S.UNSPECIFIEDhttps://orcid.org/0000-0002-0457-3872UNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, Caltech, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Russell, C.T.University of California, Los Angeles, CAUNSPECIFIEDUNSPECIFIED
Yingst, R.A.Planetary Science Institute, Tucson, AZ, USAUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:43rd Lunar and Planetary Science Conference Abstracts
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Collisional History of Vesta
Event Title:43rd Lunar and Planetary Science Conference
Event Location:The Woodlands, Texas, USA
Event Type:international Conference
Event Start Date:19 March 2012
Event End Date:23 March 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project DAWN (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Aydin, Zeynep
Deposited On:17 Dec 2012 11:02
Last Modified:24 Apr 2024 19:46

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